In September 2014, Scotland's people face a momentous choice: should they remain part of the United Kingdom, or opt for independence? As the debate hots up, Robert Peston asks the big question which is at the heart of it: would Scotland be richer or poorer as an independent nation? It is a journey which takes him from oil platforms in the North Sea, to the Shetland folk festival, and the high-tech industries of Dundee. He discovers that although money matters, it isn't the be all and end all. For many, just as important is what kind of nation Scotland wants to be.